Furnace



Dec. 10, 1929. w. H. wmE AN 1,738,680

FURNACE Filed June 13, 1925 Patented 10, 1929 UNITED STATES PATENTOFFICE WADE H. WIN'EMAN, OI CHICAGO, ILLINOIS, ASSIGNOB TO SULLIVANMACHINERY COMPANY, A CORPORATION OF MASSACHUSETTS rnauacn Applicationflledjhme 18,

My invention relates to furnaces, and more particularly to blankheatingfurnaces An object of my invention 18 to provlde an improvedfurnace. Another Qb ect of my 1nvention is to provide a blank heatingfurnace having improved means for dischargmg the blanks of highesttemperature. A further object of my invention is to provide a blankheating furnace having improved means for cooling the blank guides andfor preheating the air supply to the burner. These and other objects andadvantages of my invention Wlll hereinafter more fully appear.

In the accompanying drawings I have shown for purposes of illustrationone t'orin which my invention may assume in practice.

In these drawings, Fig. 1 is a central vertical sectional view of myimproved blank heating furnace.

Fig. 2 is a transverse sectional view taken substantially on line 2-2 ofFig. 1. 7 Fig. 3 is a detail sectional view showing the blankdischarging mechanism in a different position. 2s

In this illustrative form of my invention I have shown a blank heatingfurnace, generally designated 1, comprising a metal casing" or housing 2of generally rectangular shape preferably disposed at an angle to thevertiso cal as illustrated and suitably mounted on supporting means,herein legs 3. The casing '2 is herein lined with fire bricks 4 and hasa burner, generally designated 5, arranged/in the front wall of thecasing member adapted to'admit a gaseous mixture into a combustionchamber 6, formed by the walls of the furnace, and which isprovided'with a vent or iggflue 7 disposed at right angles to thecombustion chamber for the escape of the prod- 4 nets of combustion. v

Suitably secured to the casing, herein by bolts 8, is an angularlydisposed metal casting member 9 disposed parallel with the rear Wallof'thefurnace having a groove 10 formed therein,adapted to guide aseries of contacting blanks 11, herein in the form of cutter bits,through the combustion chamber, and

a chamber 12 cored therein. To the bottom of this chamber cold air isadmitted under pressure through a pipe connection 13 so 1923. Serial No.645,039.

to the burner 5 in such manner as to supply preheated air to the burner,thereby material- 1y improving combustion and effecting a saving infuel. Oil'fuel, or gas of any description, is admitted to the burner 5through a pipe connection 15 from any suitable source of supply. Theflame from the burner is directed onto the blanks at the bottom of themagazine, thereby heating the blanks to the maximum temperature justbefore they are discharged from the furnace, and then passes upwardly inthe flue 7 by means of a natural draft, giving the ends of the otherblanks in the member 9 a preliminary heating so that by the time theyarev in line with the burner discharge a relatively small amount ofadditional heat is required to desiredftemperature.

Referring more particularly to the blank discharge mechanism, it will benoted that I have provided a reciprocable plunger or ejector 16 adaptedto engage the bottom one of the series of blanks as it passes through anopening 17 in the fire brick 4 and force it out through an opening 18 inthe casing 2 of the bring them up to the furnace. This plunger is hereinsuitably secured to a hookportion 19 formed on a reciprocable rod 20guided, as at 21, on the casing 2 and having a collar 22 suitablyattached thereto at a point intermediate its ends. Pivoted, as at 23, onthe rear supporting member 3 is a bell crank 24 having arms 25, 26,respectively, the former being pivotally connected to the collar 22 onthe rod 20, herein by a toggle link 27, while the latter is adapted tobe pressed downward by the foot of the operator under control of aspring 28 to reciprocatethe plunger 16 as desired. If desired, the

chamber 12'will cool the guide plunger may be reciprocated by anysuitable power means. It will herein be noted that the blanks frequentlyvary inlength or he uneven with projecting ends so thatthey occasionallyvent the blank from sticking and to, act as a- .stripper for preventingtheblanks from being carried rearwardly by the plunger 16. A pin 31 isprovided which isadapte to cooperate 1.

with a slot 32 so that the pin will be engaged .by the end of the slotslightly before the plunger reaches the end of its rearwardmovement,thereby moving the member 30. to the right and permitting the stuckblanks to drop into operative position in line with the opening 18 (seeFig. 3). The stripper member 30 is herein also returned to its initialposition by means of a spring 33 disposedbetween a projection 34 formedthereon and a portion 35 formed integral with the furnace casing 2.

The mode of'operationbf my improved device will be clearly apparent fromthe description given.- With a series of blanks in position in theguiding member and the furnace heated up to the desired temperature, theair under pressure circulated through the and supply preheated air tothe burner 5 which will in turn heat the bottommost blanks to a maximumtemperature and preheat the uppei blanks. Then by. pressing down on thelever 26 theplunger 16 is reciprocated, discharging the blanks at adesired speed, the member 30 functioning in each operation of theplunger to prevent the blanks from being carried rearwardly by theplunger 16 and from sticking in the guides. 1

While I have in this application specifically described one form whichmy invention may assume in practice, it will be understood that thisform of the same is 'shdwn for purposes of illustration and that theinvention may be modified and embodied in various other forms withoutdeparting from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is: 1. In .ablank heating furnace, a heating chamber, guides therein wherein aseries of blanks are fed, said guides substantially enclosing parts ofthe body portions of the blanks to protect the same with only theportions to be worked projecting into said chamber, said guides having ahollow space substantially coextensive with said enclosed parts of thebody portions through which fluid may be supplied to cool the same, andmeans to eject the blanks from said chamber;

2. In a blank heating furnace,- a heating chamber, guides thereinwherein a series of alined superimposed blanks are fed by gravity, saidguides providing a longitudmal recess substantially enclosing part ofthe body portions of the blanks with only the portions to be workedprojecting into said chamber, said uides having a continuous hollowspace su stantially 'coextensivelwith said enclosed parts of the bodyportion through which fluid may be supplied to cool said blanks, andmeans. to eject the blanks of highest temperature from said chamber. 3.In a blank heating furnace, aheating chamber havin a flue, guidescarried in said flue and extending into said chamber wherein a series ofalined superimposed blanks are carried, said guides being in continuouscontact with the body portions of the blanks over a substantial area toprotect the same with only the portions to be worked projectinginto saidchamber, and means to eject said blanks from said chamber.

4., In a blank heating furnace, a combustion chamber, a burner to admita gaseousmixture thereto, guides disposed in said chamber wherein blanksare fed downward by gravity, and means formed in said guides whereby theair supply to said burner is preheated while cooling said guides. g

5. In a blank heating furnace, a combustion chamber having a burnertherein, air cooled guides formed therein wherein a series of blanks arefed, and means for supplying air from oneend of said guides to saidburner.

6. In a blank heating furnace, a combustion chamber, a burner to admit agaseous mixture thereto, upright blank guides in said chamber having'an'air chambertherein, means atthe a gaseous mixture thereto, a guideformed in saidv chamber: wherein a series of blanks are fed by gravity,an air chamber in said guide,

and means to admit the preheated air in said chamber to said burner tobe used inthe combustion of said oil in sa1d furnace.

8,. In a blank heating furnace, a combustion chamber having an elongatedflue at one end thereof, means to guide a series of gravity fed blanksthrough said flue and said chamber, and means located at the end of saidchamber remote from said flue to direct a flame of burning gaseousmixtureon the ends of said blanks in said chamber, said flamepreheatingsaid blanks in said flue as it passes' upward by natural draft throughsaidfiueu a 9. In a blank heating furnace, at combustion chamber, meansto guide'a series -of' T blanks through sa1d chamber, andmeans-to Idischarge the lower blank includinga plunger" and a stripper cooperatingwith and operated g-' by said plunger.

10. In a blank heatin chamber, means to fee through saidfchamber bygravity, means'to eject the lowermost blank from said chamber includinga ram, and a blank stripper co operating with said blanks therefrom. 7

tion chamber, means. to guidea-, g'vs ,eries of blanks through saidchamber, means to suechamber including a reciprocating plunger,astripper disposed parallel to said plunger, and means for reciprocatingsaid stripper including a slot and pin connection with said plunger.

14. In a blank heating furnace, a combustion chamber, means to guide aseries of blanks through said chamber, means to suc cessively dischargesaid blanks from said chamber including a reciprocating plunger, astripper disposed parallel to said plunger, and means for reciprocatingsaid stripper including a spring operative to move said stripper in onedirection.

15. In a blankheating furnace, a'heating,

chamber having'an elongated flue at one end thereof, means for guiding astack of blanks in an inclined position through said-flue and into saidchamber by gravity, a burner'discharging into said chamber at the endthereof remote from said fiue, and means for engaging and ejecting theblanks which have been longest subjected to the heat of said chamberindividually from saidguiding means.

16. In a blank heating furnace, a heating chamber having an inclinedelongated flue at one end thereof, an inclined guide arranged along saidflue and extending into said chamher for feeding a stack of blanksthereto by gravity, a burnerdischarging into said chamber at the endthereof remote from-said flue, and a plunger reciprocating in a lineperpendicular to said guide for successively engaging and ejecting thelowermost blanks in said stack individually from said chamber.

' 17. The combination comprising a blank heating furnace having a guidetherein adapted to carry a stack of blanks, means for ejecting saidblanks from said chamber, and means cooperating directly with saidfurnace, a heatinga series of blanks ram for stripping the 11. In ablank heatingfurnacega comb nece'ssively discharge said blanks, striperl ejecting means for preventing said blanks from sticking insaidguide. I

18. The combinationcomprising a blank heating furnace having a 'heatingchamber, means to guide a series of gravity fed blanks throughsaidchamber, means for ejecting .said blanks from said chamber, andmeans cooperating directly with said ejecting means for preventing s'aidblanks from sticking in said guiding means.

19. The combination comprising .a blank heating furnace having'a heatingchamber,

means to guide a series of gravity fed blanks through said chamber,means for ejecting said blanks from said chamber,and means cooperatingdirectly with and operated by said ejecting means including areciprocable member. for preventing said blanks from sticking in saidguiding means.

20. In a blank heating furnace,,a combustion chamber, .an inclined guideformed in said chamber at one end thereof for guiding their portions tobe worked projecting from the guides, and a burner located at theopposite end of said chamber from said guide and discharging in adirection toward said guide whereby the maximum heat is concentrated inthe locality of said guide.

21. In a blank heating furnace, a combustion chamber; provided with anelongated flue at the top and at one end thereof, an inclined guide'invsaid chamber parallel with said fluefor guiding a series of blankstherethrough, and a burner located at the end of a series of blankstherethrough with only said chamber remote froms'aid flue anddischarging ina direction toward said guide.

22. Inea blank heating furnace, a combustionchamber provided with aninclined surface and an elongated flue at one end thereof a burnerdischarging into said chamber at the end thereof remote from said flue,means for guiding a series of superimposed gravity fed blanks along saidflue adjacent said surface and intQ said chamber, and a plunger forsuccessively engaging and ejecting the lowermost blank individually fromsaid chamber.

' 23. In a blank heating furnace, a combustion chamber having a burnertherein, inclined air cooledguides formed therein wherein a series ofblanks are fed by gravity, and means for supplying pre-hcated air fromsaid guides to said burner.

24. In a blank heating furnace, a combustion chamber, means for guidinga series of gravity 'fed blanks through said chamber, a plunger forsuccessively engaging and ejecting the lowermost blank of said seriesindividually from said chamber, and stripper means for preventing theblanks from moving rearwardly with said plunger.

25. In ablank heating furnace, a combusejecting the lowermost blank ofsaid series from said-chamber, and means including a resilientlypositioned stripper member co- 7 operating with, said plunger forpreventing. the blanks from moving rearwardly with said plunger.

26. In a blank heating furnace, a combustion chamber, aseries of blankstherein, a plunger for ejecting said blanks, a blank strippercooperating with said plunger, and a lost motion connection between saidplunger and stripper.

27. Ina blankheating furnace a combustion chamber having an inclinedbottom and an elongated flue at one end thereof, means for guiding aseries of inclined blanks along a said line and through said chamber,and a burner disposed at the opposite end of said chamber anddischarging longitudinally of said bottom toward said guiding means andblanks.

28. In a blank heating furnace, an inclined combustion chamber providedwith an elongated fiue at one end thereof and disposedperpendicularthereto, a burner at the opposite end of said chamber discharging towardsaid flue, means to guide a series of gravity fed blanks along said flueand-through said chamber, and means for ejecting the blanks from thelowermost portion of said combustion chamber.

g 29. In a blank'heating furnace, a combustion chamber provided with anelongated flue at one end thereof, means to guide a series ofsuperimposed blanks'in-a straight line along said flue and through saidchamber, a

' burner-at the opposite end of said chamber discharging toward saidflue, and means in cludlng a plunger reciprocable 111 line with thelowermost blank for discharging said blank from said chamber.

30. In a blank heating furnace, a combustion chamber provided with anelongated flue at one end thereof, means to guide a series of inclinedblanks along said flue and through V said chamber, a burner discharginginto said chamber at the end thereof remote from said fine, and meansincluding a plunger reciprocable in line with the lowermost blank forejecting the latter laterally from said chamber.

31,. In a blank heating furnace, a combustion chamber having a flue, aseries of blanks guided along said flue, a plunger for successivelyengaging and ejecting the lowermost blank of said series individuallyfrom said chamber, and means including a rod disposed parallel with saidplunger and cooperating lever mechanism for reciprocating said plunger.

32. The combination comprising a blank heating furnace having a guideadapted to receive a stack of gravity fed blanks, means for successivelyengaging and ejecting said blanks, and means for preventing the blanks1,7ss,eso

directly with said ejecting means and operated by the latter.

In testimony whereof I affix my signature.

, WADE H. WINEMAN.

